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Vulnerability record · CVE-2026-48031 · published 3 August 2026

CVE-2026-48031: Hard-coded credentials vulnerability

go-base is a Go RESTful API Boilerplate template with JWT Authentication, backed by PostgreSQL. In versions prior to 2026-05-18, the JWT signing secret is hardcoded to the known string "random", letting any attacker who reads the public repository forge tokens for arbitrary users, including admin roles, and completely bypass authentication on all protected endpoints. This value is set in two places: the dev.env template (line 10) and a programmatic fallback in cmd/serve.go (line 35), so the application uses it even when no .env file is present. The original mitigation in auth/jwt/tokenauth.go (lines 22 to 25) only caught the exact string "random", letting other weak secrets through, and replaced it with an in-memory key that was not persisted, invalidating all tokens on every restart and effectively causing a denial-of-service. This issue has been fixed in version 2026-05-18.

9.1 CVSS 3.1 Critical EPSS 0.63% · top 52.1% CWE-798 · Hard-coded credentials Deferred
9.1CVSS 3.1 base score
0.63%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
10 Sep 2026Last modified by NVD

Description

go-base is a Go RESTful API Boilerplate template with JWT Authentication, backed by PostgreSQL. In versions prior to 2026-05-18, the JWT signing secret is hardcoded to the known string "random", letting any attacker who reads the public repository forge tokens for arbitrary users, including admin roles, and completely bypass authentication on all protected endpoints. This value is set in two places: the dev.env template (line 10) and a programmatic fallback in cmd/serve.go (line 35), so the application uses it even when no .env file is present. The original mitigation in auth/jwt/tokenauth.go (lines 22 to 25) only caught the exact string "random", letting other weak secrets through, and replaced it with an in-memory key that was not persisted, invalidating all tokens on every restart and effectively causing a denial-of-service. This issue has been fixed in version 2026-05-18.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

LinkTags
https://github.com/dhax/go-base/commit/cc82b9740fa6b08e0fad409cd4b418e240dd0e00
https://github.com/dhax/go-base/pull/31
https://github.com/dhax/go-base/security/advisories/GHSA-mqq6-462x-jxmm
https://github.com/dhax/go-base/security/advisories/GHSA-mqq6-462x-jxmm

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Source: NIST National Vulnerability Database (record CVE-2026-48031), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.